More terms. More concise, plain-English,definitions. And more
`thelatest and greatest information on everything related to the ;
`world of computers!
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`Quesauthoritative dictionary explains over 2,500 terms, acro y ,
`jargon, and techno-babble—all translated into easy-to-unde I,
`English. This is the most up-to—date dictionary available, cover
`everything from Accelerator Boards to Zapf Dingbats.
`
`Each entry is concise and practical, providing you with use
`information on how to interpret the language of computers"
`apply it to your daily tasks. Que-*5 Computer Users Dict
`5th Edition, istheperfect resource for computer know
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`Packed with easy-to-use features!
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`I Insider tips to help you work
`smarter and faster
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`I Cautions that point out trouble
`spots to amid
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`Illustrations to shed light
`“on key terms
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`I Extensive I
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`Category: GeneralEbu;qQing
`ser Level:All Users
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`Covers: IBM & Compatibles
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`and Macintosh
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`$12.93 USA
`|N1_56529_881,
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`Sony,
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`1021, p.1
`
`Sony, Ex. 1021, p.1
`
`

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`Sony, Ex. 1021, p.2
`
`

`
`timed backup
`
`CI1U1rmc1N: Using a timed backup feature is no substitute for
`saving your work to disk at the end of a working session. The
`files created by timed backup utilities are temporary files that
`are deleted when you exit the program properly. Use timed
`backups, but don't forget to save your work. See backup proce(cid:173)
`dure, save, and tape drive.
`
`time division multiplexing
`In local area networks, a tech(cid:173)
`nique for transmitting two or more signals over the same cable by
`alternating them, one after the other. Time division multiplexing
`is used in baseband (digital) networks. See baseband, .frequency
`division multiplexing, local area network (LAN), and multiplexing.
`
`An interruption, resulting in a frozen keyboard, while
`the computer tries to access a device (or a remote computer) that
`isn't responding as it should. The computer keeps trying for a
`predetermined time and then gives up, returning control to you.
`
`time-sharing A technique for sharing a multiuser computer's
`resources in which each user has the illusion that he or she is the only
`person using the system. In the largest mainframe systems, hundreds
`or even thousands of people can use the system simultaneously with(cid:173)
`out realizing that others are doing so. At times of peak usage, how(cid:173)
`ever, system response time tends to decline noticeably.
`
`title bar
`In graphical user interfaces such as Microsoft Win(cid:173)
`dows, a bar that stretches across the top of a window, indicating
`the name of the document displayed in that window. The color of
`the title bar indicates whether the window is active. See graphical
`user interface (GUI).
`
`toggle To switch back and forth between two modes or states.
`On the IBM PC-compatible keyboard, for example, the Caps Lock
`key is a toggle key. When you press the key the first time, you switch
`the keyboard into a caps-entry mode. When you press the key the
`second time, you switch the keyboard back to the normal mode, in
`which you must press the Shift key to type capital letters.
`
`- - - - - - - - - - - - - - -
`toner 495
`
`If you're shopping for an IBM PC-compatible system, look for
`one equipped with a keyboard that has indicator lights for the Caps
`Lock, Num Lock, and Scroll Lock keys. Without these lights, you
`may not realize that you've pressed one of these keys accidentally.
`
`A key that switches back and forth between two
`modes. See Caps Lock key, Num Lock key, Scroll Lock key, and toggle.
`
`In local area networks, a network protocol
`in which a special bit configuration, called a token, is circulated
`among the workstations. A node gains access to the network only
`if the node can obtain a free token. The node converts the token
`into a data .frame containing a network message.
`
`Every workstation constantly monitors the network to catch a
`token addressed to that workstation. When a workstation receives
`a token, it attaches an acknowledgment message to the data frame.
`When the data frame with an acknowledgment comes back to the
`source node, the node puts a token into circulation.
`
`Because token passing rules out the data collisions that occur when
`two devices begin transmitting at the same time, this channel
`access method is preferred for large, high-volume networks. See
`carrier sense multiple access with collision detection (CSMAICD),
`contention, local area network (LAN), and polling.
`
`token-ring network
`In local area networks, a network architec(cid:173)
`ture that combines token passing with a hybrid star/ring topology.
`
`Developed by IBM and announced in 1986, the IBM Token-Ring
`Network uses a Multistation Access Unit at its hub. This unit is
`wired with twisted-pair cable in a star configuration with up to
`255 workstations, but the resulting network is actually a decentral(cid:173)
`ized ring network. See local area network (LAN) and token passing.
`
`toner The electrically charged ink used in laser printers and
`photocopying machines. To form the image, toner is applied to an
`electrostatically charged drum and fused to the paper by a heating
`element. See laser printer and toner cartridge.
`
`Sony, Ex. 1021, p.3